My suspicion is that this is because a RAID0 can suffer no failures.
When one disk of a RAID1 or RAID5 fails, the remaining drives continue operating normally. But as soon as one drive of a RAID0 fails, Linux can no longer perform any operations on the array.
If Linux does nothing, instead of marking the drive as failed, then there is a chance you can repair/replace/recover the failed drive and restart the array.
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